This excerpt taken from the VRSN 10-K filed Jul 12, 2007.
2. OBLIGATIONS OF THE PARTIES
2.1. System Operation and Access. Throughout the Term of this Agreement, VNDS shall operate the System and provide Registrar with access to the System to transmit domain name registration information for the Registry TLD to the System.
2.2. Distribution of RRP, EPP, APIs and Software. No later than three business days after the Effective Date of this Agreement, VNDS shall make available to Registrar (i) full documentation of the Supported Protocol, (ii) C and/or Java application program interfaces (APIs) to the Supported Protocol with documentation, and (iii) reference client software (Software) that will allow Registrar to develop its system to register second-level domain names through the System for the Registry TLD. If VNDS elects to modify or upgrade the APIs and/or Supported Protocol, VNDS shall provide updated APIs to the Supported Protocol with documentation and updated Software to Registrar promptly as such updates become available.
2.3. Registrar Responsibility for Customer Support. Registrar shall be responsible for providing customer service (including domain name record support), billing and technical support, and customer interface to accept customer (the Registered Name Holder) orders.
2.4. Data Submission Requirements. As part of its registration and sponsorship of Registered Names in the Registry TLD, Registrar shall submit complete data as required by technical specifications of the System that are made available to Registrar from time to time.
2.5. License. Registrar grants VNDS as Registry a non-exclusive nontransferable worldwide limited license to the data elements consisting of the Registered Name, the IP addresses of nameservers, and the identity of the registering registrar for propagation of and the provision of authorized access to the TLD zone files or as otherwise required or permitted by VNDSs Registry Agreement with ICANN concerning the operation of the Registry TLD, as may be amended from time to time.